fixed a typo
improved wording
better parameter names for some bearings

also adjusted geometries and drawings
replaced tori by rings for performance

Tori are really slow. Fixes #38. Also cleaned up code a bit and unsuppressed
common parameter combinations.
fixed typo
table checker

finds inconsisten row lengths. Other checks mentioned in #46 point 1 are
not robust enough and find plenty of false positives.
fixed problem with table

caused by copy and paste